What is the Color Matrix option really doing when it is set to "Cine"?

Is this applying a log curve to the chroma and/or hue response in the same way that setting the gamma to "Cine" changes luminance from linear to log? Or is it something else?

Thanks.

Did you check page 68 of the (NTSC) manual:

Chapter: Using the Custom Preset
Paragraph: Gamma Curve

If you have the PAL manual look up that chapter.

Yeah, that graph is just "representational" and doesn't give specific values; not sure exactly what is being changed and by how much between NORMAL and CINE in the Color Matrix setting. Just looking at the graph, it appears to pull the curve a bit toward, but not all the way to, linear. (The second graph below it with the straight lines looks to be just for knee and black, not the CINE modes.)

Poorly documented. I doubt if the specific details are published -- it might require doing sample shots of a color chart in both modes and analyzing them to really understand what is being done to the color matrix.

I don't have the time or talent for this particular issue but I do hope someone does.

Of course I read the manual.

I can not detect any appreciable difference between CINE and NORMAL for the Color Matrix. Furthermore the docs are talking about the gamma settings with that chart - not the Color Matrix.

It is a wonder as to what it actually is.

I am begining to suspect that no one really knows what Color Matrix does beyond the vague description in the manual. I can't generally detect a difference, but I suspect it may be a result of my other settings making this one undetectable.

The best way perhaps to get to the bottom of what it does is hook
the camera up to something that can display vector scopes and
histograms in real-time (preferably for each color channel
separately!)

Then it can be seen what happens to the signal more clearly. It
could also be done in a similar way in post, but requires much
more (paper) work.

If I had an XL2 I'd be willing to try it, but santa hasn't brought me
one yet <g>